A falling book in mid-air has___ A. both potential and kinetic energy
B. only kinetic energy
C. chemical energy
D. only potential energy

What do you mean by that? like the contents? the thc level?

Rn in the right answer

Neither model is able to show the reactivity of potassium.

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.